| Vol. 53, No. 6 December 1999 pp. 963–969 Polarization of the cosmic microwave background radiation T R SESHADRI Mehta Research Institute, Chhatnag Road, Jhusi, Allahabad 211 019, India Email: seshadri@mri.ernet.in Abstract. In re-ionized models, the measurement of polarization of CMBR can be a good criterion to narrow down the parameter space for cosmological models. A Vishniac-type effect in second order polarization over arc minute scales has been calculated. It has been shown that while the effect is very small (~ 10- 2m K) for CDM models, it can be significant (0.3 m K) for some isocurvature models. Keywords. Cosmology; large scale structure; CMBR. PACS Nos 98.65.Dx; 98.70.Vc; 98.80.Es |